EP1598991B1 - Procédé et système de transmission de signaux au moyen de sauts de fréquence - Google Patents

Procédé et système de transmission de signaux au moyen de sauts de fréquence Download PDF

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Publication number
EP1598991B1
EP1598991B1 EP05015582A EP05015582A EP1598991B1 EP 1598991 B1 EP1598991 B1 EP 1598991B1 EP 05015582 A EP05015582 A EP 05015582A EP 05015582 A EP05015582 A EP 05015582A EP 1598991 B1 EP1598991 B1 EP 1598991B1
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EP
European Patent Office
Prior art keywords
channels
channel
master unit
transmission
slave unit
Prior art date
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EP05015582A
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German (de)
English (en)
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EP1598991A1 (fr
Inventor
Martin Sandal Nielsen
Erik Bundsbaek Mouridsen
Henning Soerensen
Jakob Trelborg
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VKR Holding AS
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VKR Holding AS
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Priority to AT05015582T priority Critical patent/ATE404004T1/de
Priority to PT05015582T priority patent/PT1598991E/pt
Priority to DE60228141T priority patent/DE60228141D1/de
Priority to DK05015582T priority patent/DK1598991T3/da
Priority to ES05015582T priority patent/ES2313156T3/es
Application filed by VKR Holding AS filed Critical VKR Holding AS
Priority to EP05015582A priority patent/EP1598991B1/fr
Priority claimed from EP02805738A external-priority patent/EP1461790B1/fr
Publication of EP1598991A1 publication Critical patent/EP1598991A1/fr
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Publication of EP1598991B1 publication Critical patent/EP1598991B1/fr
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
    • G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link

Definitions

  • the invention relates to a method of transmitting signals, e.g. control signals, request signals, interrogation signals etc. in a control system comprising at least two units, wherein at least one of said units is designed to operate as a master unit and wherein at least one of said units is designed to operate as a slave unit, as specified in the preamble of claim 1.
  • signals e.g. control signals, request signals, interrogation signals etc.
  • a control system comprising at least two units, wherein at least one of said units is designed to operate as a master unit and wherein at least one of said units is designed to operate as a slave unit, as specified in the preamble of claim 1.
  • the invention also relates to a system for transmitting signals, e.g. control signals, request signals, interrogation signals etc. comprising at least two units, wherein at least one of said units is designed to operate as a master unit and wherein at least one of said units is designed to operate as a slave unit, as specified in the preamble of claim 14.
  • signals e.g. control signals, request signals, interrogation signals etc.
  • at least two units wherein at least one of said units is designed to operate as a master unit and wherein at least one of said units is designed to operate as a slave unit, as specified in the preamble of claim 14.
  • DE 93 19 508 U1 discloses a control system in which the master unit detects a vacant channel and transmits a signal to a slave unit via said vacant channel.
  • DE 195 02 839 C1 discloses a control system wherein a slave unit performs the step of scanning channels for a transmitted signal from a master unit.
  • EP 0 428 322 A1 discloses a radio telemetry system for collecting the readings of for example electricity consumption meters.
  • the system comprises a master station placed on a vehicle, which master station can communicate with a plurality of transponders, each related to a consumption meter.
  • the communication can take place using a relatively large number of frequencies or channels.
  • the transponders are designed to be listening for a predetermined time on each of the channels in turn.
  • the master station determines which of the channels is being used the least by other users, the quietest channel, and uses this channel for attempting to communicate with the transponders, which takes place by transmitting a general wake-up signal to the transponders.
  • a transponder that has received the wake-up signal will transmit an acknowledgement signal containing an address unique to the transponder to the master station.
  • the transponder will listen a predetermined time for a reply from the master station on the channel in question. If such a reply signal containing the unique address is not received within a predetermined time, the transponder will return to the cycle, in which it listens to the channels in turn.
  • the master station receives the strongest of the acknowledgement signals transmitted by the transponders, registers the unique address and will in return send a signal containing the address on the channel.
  • the transponders receiving the signal will look for the address and the transponder having the unique address will transmit to the master station a signal containing the requested consumption data.
  • the transponder is instructed to go into sleep mode for a time, while the master station attempts to communicate with other transponders in similar manner. If the master station does not succeed in communicating with transponders on the quietest channel, it will turn to the second quietest channel, and if this also fails to the third quietest channel. If this also fails, it will re-determine which of the plurality of channels is the quietest and start again.
  • WO 02/11097 A1 discloses a radio control system comprising a transmitter and a receiver, where the radio control receiver comprises a unique code and is designed for scanning a number of channels, until it detects a signal containing its unique code, in which case it locks onto the channel. If the code is not detected on a channel, the receiver steps to the next channel.
  • the radio control transmitter comprises a store containing one or more codes corresponding to devices, which it is intended to control. Further, the transmitter comprises input devices for selecting the transmission channel. In an alternative, the transmitter may scan the channels in order to find an idle channel.
  • the receiver is also arranged to assess the quality of the received signals and if the quality is poor, the receiver can send a signal to the transmitter instructing it to use another channel.
  • an objective of the invention is to provide a method and a system by means of which control signals, interrogation signals etc. may be transmitted between units in a system utilizing more than one channel.
  • a still further objective is to provide such a method and such a system, which is reliable and effective.
  • the invention relates to a method of transmitting signals, e.g. control signals, request signals, interrogation signals etc. in a control system comprising at least two units, wherein at least one of said units is designed to operate as a master unit and wherein at least one of said units is designed to operate as a slave unit,
  • said master unit may jump to another channel by randomly selecting another channel of said plurality of channels available for transmission.
  • said master unit may jump to another channel by selecting another channel of said plurality of channels available for transmission in accordance with a predefined strategy.
  • the strategy for jumping to another channel may depend on a number of factors and may be performed in a number of ways, e.g. jump backwards, forwards, to a channel having a relatively large success rate, etc.
  • said master unit may test said channel for a reply, e.g. a response signal by waiting in a receive mode for a predetermined time.
  • a reply e.g. a response signal by waiting in a receive mode for a predetermined time.
  • said master unit may transmit said signal in a timeslot selected from a number of available timeslots and said number of timeslots may be enhanced, for example doubled, when an unsuccessful attempt of transmission has been performed.
  • the risk of collision may be further, since the chance that two (or more) master units select the same timeslot is reduced.
  • the signal transmitted by said slave unit comprises a preamble having a length corresponding at least to the time required for said at least one other unit to test said channels for a transmitted signal, it is achieved that a slave unit comprised in a system has sufficient time for testing all available channels during the length of the preamble.
  • said step of detecting a vacant channel may comprise the step of testing for a carrier wave.
  • said at least one slave unit may perform the step of testing said channels for a transmitted signal by testing said preamble for a predefined characteristic, e.g. a symbol, a bit sequence etc.
  • said at least one slave unit may perform the step of testing said channels for a predefined characteristic, e.g. a symbol, a bit sequence etc. repeated a number of times, for example two, three, four times etc.
  • a predefined characteristic e.g. a symbol, a bit sequence etc. repeated a number of times, for example two, three, four times etc.
  • said at least one slave unit may perform the step of testing said channels for a transmitted signal by testing for a carrier wave.
  • the number of said plurality of channels may be two.
  • the number of said plurality of channels may be three.
  • the number of said plurality of channels may at least be four and at the most 15.
  • said master unit may perform the step of testing for a vacant channel by scanning the plurality of channels.
  • said scanning performed by said master unit may be performed in accordance with predefined algorithms, e.g. possibly taking into account previous transmissions performed.
  • said at least one slave unit may perform the step of scanning the channels for transmitted signals by continuously or essentially continuously scanning the channels in a sequential order, or it might be done in accordance with predefined algorithms.
  • the invention also relates to a control system for transmitting signals, e.g. control signals, request signals, interrogation signals etc. comprising at least two units, wherein at least one of said units is designed to operate as a master unit and wherein at least one of said units is designed to operate as a slave unit,
  • said master unit may be configured to jump to another channel by randomly selecting another channel of said plurality of channels available for transmission.
  • said master unit may be configured to jump to another channel by selecting another channel of said plurality of channels available for transmission in accordance with a predefined strategy.
  • said master unit may be configured to test said channel for a reply, e.g. a response signal by waiting in a receive mode for a predetermined time.
  • the strategy for jumping to another channel may depend on a number of factors and may be performed in a number of ways, e.g. jump backwards, forwards, to a channel having a relatively large success rate, etc.
  • said master unit may be configured to transmit said signal in a timeslot selected from a number of available timeslots and said number of timeslots may be enhanced, for example doubled, when an unsuccessful attempt of transmission has been performed.
  • the risk of collision may be further, since the chance that two (or more) master units selects the same timeslot is reduced.
  • said at least one unit designed to operate as a master unit may comprise control means for performing a scan of a plurality of channels.
  • control means may comprise means for operating in accordance with predefined algorithms.
  • said at least one unit designed to operate as a slave unit may comprise control means for performing a sequential scan of the plurality of channels.
  • said system may be designed to operate in accordance with a method according to one or more of claims 1-13.
  • Fig. 1 shows a general overview of a system according to a first embodiment of the invention.
  • the system comprises a plurality of units 2, 4, 6, 8 (U1 - Un) comprising or linked to for example drive units for various devices 10, 12, 14, 16. These devices may for example be activators of various types and used in a wide variety of applications, as explained in further detail later on.
  • the units may also or instead comprise or be linked to assorted apparatus, measuring devices, indicating devices, controllers etc. that need to receive information, control signals etc. at certain points of time.
  • a common feature of the units 2, 4, 6, 8 is that it is necessary or advantageous to be able to send some sort of information, signal etc. to the units. Further, it may be necessary or preferable to be able to receive information or signals from the units, e.g. confirmation signals, acknowledgement signals, measurement signals etc.
  • all units 2, 4, 6, 8 are equipped with receiving means for radio frequency signals, e.g. including antenna means 18, 20, 22, 24.
  • Each unit comprises e.g. one or more motor drive units or control units and is connected to a driven or controlled member 10, 12, 14, 16. It will be understood that the means driven by, controlled by etc. the unit may be integrated with the unit. It will be understood that a system may comprise one or more units U1 - Un and that, when more than one unit are involved, these may be similar or dissimilar and may control one or more similar or different devices.
  • the units U1 - Un will also be referred to as controllable units or slave units in the following.
  • the system further comprises a remote control unit (C1) 26 designed for transmission of signals by means of radio frequency transmission means, e.g. including antenna means 28.
  • This control unit may be used for transmitting control signals or other types of signals to one or more of the units U1 - Un in the system.
  • the system may comprise at least one additional remote control unit (C2 - Cn) 30, 34 similar to the first remote control, e.g. designed for transmission of signals by means of radio frequency transmission means, e.g. including antenna means 32, 36 or dissimilar to the first remote control, e.g. designed for transmission by other means such as wired means, infra red transmission means etc (not illustrated in fig. 1 ).
  • additional remote control unit C2 - Cn
  • the remote controls C1 - Cn will also be referred to as controllers or master units in the following.
  • the units U1 - Un and the controllers C1 - Cn will also be referred to as nodes in the illustrated system.
  • a master unit e.g. the remote control 26 (C1)
  • the other (controllable) units U1 - Un which also will be described as slave units in the following, will now be described in further detail.
  • a master unit will imply a unit or a node in a communication system that initiates a transmission of data
  • a slave unit correspondingly will imply a unit that receives and responds to a transmission from a master unit.
  • any of the units involved in the system illustrated in fig. 1 may in principle take the role as a master unit as well as a slave unit in accordance with this definition.
  • the transmission of data between the units involved will take the form of a transmission of messages comprising a number of frames, packages or the like that are being transmitted between the units, e.g. a first frame from a first unit to a second unit, a second frame from the second unit to the first unit etc.
  • a frame or a package comprises a number of bits that are transmitted consecutively.
  • a message will contain two or four frames, but it will be understood that the number of frames, e.g. one, two, three, four, five etc. may be arranged according to the actual application and needs.
  • a number of communication channels or frequencies may be used for the communication. It will be understood that more than one master unit may need to communicate with a slave unit at a specific point of time in the system illustrated in fig. 1 , and further it will be understood that a similar system comprising similar units may be situated nearby, e.g. whereby units from one system may occupy a channel needed for communication by units in the other system. In order to facilitate an optimal communication in these and other situations using a number of channels or frequencies, a frequency hopping technique is used in accordance with the invention.
  • first frame, F1 of a message transmitted from a master unit is illustrated, and subsequent frames F2 and F3 etc. are shown as well.
  • Each of the frames comprises a preamble part PREn and a payload data part PAYn.
  • the preamble PRE1 of the first frame F1 is substantially larger than the preambles of the rest of the frames in a message.
  • the subsequent frames will serve to contain the actual information, control signalling etc, that are to be transmitted to a slave unit, whereas the preamble PRE1 of the first frame of a message will serve to alert a slave unit that a message is transmitted on a given channel as explained in further detail in the following.
  • each of the slave units will scan all of the obtainable channels, e.g. CH1, CH2, ... CHm.
  • each slave unit will as illustrated examine, e.g. listen to, each channel for a message or rather a preamble comprised in a first frame of a message.
  • each slave unit may also in addition examine each channel for a carrier wave.
  • a preamble of a first frame of a message from a master unit will have to have a duration at least equal to m times A. Possibly, the duration of such a preamble PRE1 will also have to take into account the time needed for a slave unit to shift from one channel to the next.
  • the illustrated first frame, F1 contains a preamble PRE1 serving the purpose of alerting the slave units, and further the preamble may contain particular information, e.g. system specific information giving the slave unit(s) the information that the message originates from a master unit related to the same system as the slave unit(s).
  • the preamble may contain the number 55h, corresponding to the bit sequence 01010101.
  • the method and the system according to the invention may be designed in such a manner that the bit sequence in question is repeated a number of times k in the preamble of a first frame of a message and that the slave units are designed in such a manner that the bit sequence in question will have to be detected a number of times 1 ( ⁇ k) before a slave unit stops the scanning procedure and listens to the channel on which the bit sequence is detected.
  • a slave unit may be set up to require a specific symbol to be detected one, two, three, four or more times before it is determined that a master unit is trying to transmit a message on a given channel.
  • a noise signal is present on a channel there will be a certain probability that the predefined symbol will be stochastically present one time, but the likelihood that the symbol will be repeated one or more times will be significantly lower.
  • the predefined symbol e.g. the bit sequence repeated a number of times
  • the slave unit detect the bit sequence a number of times before the slave unit decides that a message is transmitted via the channel in question, the risk of erroneous detection caused by noise signals on a channel is significantly reduced.
  • Fig. 3 shows a flowchart illustrating a transmit algorithm, e.g. illustrating the operation 40 of a master unit that initiates a transmission of data.
  • a transmit start step (TX-SP) 45 is performed, after which the master unit is ready for operation.
  • the master unit will now investigate whether other units, including units of other types, marks etc. are utilizing the channels allocated to the system. This is done for all channel allocated to the system and will be described in further detail later on. If the first channel is not available, i.e. not vacant, the master unit will proceed to another channel etc. In fig. 3 it is illustrated that three channels are allocated to the system, as illustrated by the subparts 41, 42 and 43, and the operations performed are essentially identical. If all of the allocated channels are non-available, the master unit will return to the first channel and proceed in a loop as illustrated. However, as shown by the block 46, a counter may be included and an upper limit n may be predefined. If a vacant channel is not found in n loops, the operation may be cancelled and possibly re-initiated after predefined time duration.
  • a channel is selected, e.g. channel 1 (CH1).
  • the master unit investigates whether a carrier wave (Carr) is present, e.g. by measuring the strength of the electromagnetic field. If this is the case, e.g. indicating that another transmitter is using the channel, the master unit will proceed to the next channel, CH2 etc. If a carrier wave is not present in the channel in question, a timeslot will be randomly selected, and the master unit waits until this timeslot is due (WTS) 52. In a preferred embodiment four timeslots, each having a duration of x ms, are involved that may be selected randomly. Evidently, fewer or more than four timeslots may be involved according to the invention.
  • the presence of a carrier wave (Carr) is again examined 53. If a carrier wave is present, the system returns to the loop and proceeds to the next channel.
  • the transmission of the data will be initiated (TX-D) in step 54.
  • TX-D transmission of the data
  • the preamble of the first frame of a message will be of a particular long duration, allowing the slave unit to be alerted. The operations performed by the slave unit(s) will be described later on.
  • the master unit When the transmission of data is completed, the master unit will go into receive mode (RX-M) 55 on the channel in question. If a response, e.g. an acknowledgement (Ack?) 56 from a slave unit is not received within a predefined time interval, the master unit will proceed to another channel. As indicated it may proceed to the next channel, but preferably it will jump randomly to another channel.
  • RX-M receive mode
  • Ack acknowledgement
  • the remote control unit Cn may try to transmit a message to the unit U2.
  • another transmitter for example the remote control C1 located at a distance from the master unit in question, may try to contact the slave unit, e.g. U2 via the same channel.
  • the master unit in question e.g.
  • Cn may not be able to measure the carrier wave from the other transmitter, e.g. C1.
  • Both master units will then try to transmit data on the channel, but will fail in establishing a communication with the slave unit, e.g. U2. If both master units would then proceed to the next channel, there would be a risk that they would again collide, if they would happen to select the same random timeslot. Instead, they may both jump randomly to another channel, as explained above, whereby the risk of collision may be reduced.
  • the strategy for jumping to another channel may depend on a number of factors and may be performed in a number of ways, e.g. jump backwards, forwards, to a channel having a relatively large success rate, etc.
  • the risk of collision may be reduced by enhancing the number of available time slots if an unsuccessful attempt of transmission has been performed.
  • the number of available timeslots may be doubled in relation to the normal number of timeslots, etc, whereby the chance that two (or more) master units selects the same timeslot is reduced.
  • the system may jump to another channel as indicated by the punctuated line 59 in figs. 3 and 4 .
  • a jump may be caused by a number of factors and/or based on certain algorithms, statistical data etc.
  • information in the transmitted message may contain information regarding the channel to which the system shall jump when the transmission is completed.
  • the system may comprise data processing means and storage means, whereby information regarding the success rate for each channel is calculated and stored, and the system may be controlled in such a manner that it will jump to the channel having the largest success rate.
  • Such an algorithm may be modified in order to take into account that a recent success is more valuable than a previous success, e.g.
  • fig. 5 shows a flowchart generally designated 60 illustrating the steps performed by a slave unit.
  • a slave unit not involved in a transmission and/or reception of data will continuously scan the channels allocated to the system, for example the three channels illustrated in the figures.
  • the receiver channel search (RXCS) is initiated at 65, and the slave unit will start e.g. at channel 1 (CH1) at 66.
  • CH1 channel 1
  • C-R channel 1
  • the slave unit may in addition examine whether a carrier wave is present. The detection of a carrier wave may be optional, since the detection of the predefined symbol, possibly repeated a number of times, will be sufficient to determine a request. Further, as previously described, the scanning must be performed within a limited time interval A.
  • the slave unit will proceed to the next channel.
  • the slave unit will interpret this as an indication of that a master unit has initiated a transmission, and that the master unit utilizes the method of communication according to the embodiment of the invention.
  • a transmitter using another method of communication could be the transmitter of the signal received by the slave unit, but this would require that the same modulation and baud rate should be used and that the preamble should contain the same symbol (possibly repeated the predefined number of times) in the preamble.
  • the slave unit When the slave unit recognizes the symbol of the preamble it will wait on the channel until the complete frame is received (WCF) as indicated at 68. If an error occurs or if a predefined time duration is exceeded, the slave unit will return to the channel scanning procedure.
  • WCF complete frame
  • the slave unit will check that the frame is addressed to the slave unit in question (MA? My address) at 69. If not, the slave unit will return to the channel scan.
  • the slave unit will respond on the channel to the master unit with a frame having a normal length. Further frames may be transmitted from the master unit to the slave unit and vice versa, and these frames will also be transmitted on the same channel (RC-MES) at 70, until the transmission of the frames with normal preambles is completed. After this, the system will return to the channel scanning.
  • RC-MES channel-MES
  • the slave unit will return to the channel-scanning loop again.
  • the invention has been described above in general, but it will be understood that the invention may be particularly advantageous in connection with remote control of controlled aperture members such operable windows, doors etc, having a member which maybe opened and closed. Further, the invention may be utilized in connection with any member associated with e.g. a window, a door or a similar aperture member of a building, where it is desired and/or advantageous to be able to operate a movable member such as a curtain, blinds etc.
  • the invention is not limited to the particular examples described above but may be used in connection with a wide variety of applications.
  • the invention may be used in application related to home information and/or automation systems, ventilation, heating, air conditioning systems etc. in buildings and similar structures, etc.
  • the number of available channels may vary in accordance with the particular circumstances and needs, e.g. a number of two, three, four etc. may be utilized. However, in order to achieve a relatively uncomplicated system, the number of channels are preferably less than e.g. 25, e.g. less than 20, less than 15, less than 10 etc.
  • the number of units in a system may be varied within a relatively large interval and it will be understood that the units may be designed to be able to perform exclusively as master unit or as slave unit or some or all of the units may be able to take the role as both master and slave unit.
  • the invention may of course include the situation where only two units, a master unit and a slave unit are involved.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Transmitters (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)

Claims (21)

  1. Procédé de transmission de signaux, par exemple de signaux de commande, de signaux de requête, de signaux d'interrogation, etc., dans un système de commande comprenant au moins deux unités, dans lequel au moins l'une desdites unités est conçue pour fonctionner comme une unité maître (26, 30, 34) et dans lequel au moins l'une desdites unités est conçue pour fonctionner comme une unité esclave (2, 4, 6, 8), selon lequel une pluralité de canaux (CH1, CH2, CH3) peuvent être utilisés pour la transmission,
    - selon lequel une unité maître exécute les étapes de détection d'un canal vacant parmi ladite pluralité de canaux disponibles pour la transmission et de transmission d'un signal par l'intermédiaire dudit canal vacant, et
    - selon lequel au moins une unité esclave exécute l'étape de balayage de la pluralité de canaux disponibles pour la transmission pour les signaux transmis,
    caractérisé en ce que
    - ledit signal transmis par ladite unité maître comprend un préambule (PRE1) ayant une longueur correspondant au moins à la durée requise pour que ladite au moins une unité esclave teste lesdits canaux pour un signal transmis et dans lequel ledit signal comprend en outre une adresse pour ladite unité esclave, et dans lequel
    - ladite unité maître attend une réponse de l'unité esclave après avoir transmis signal (54), et si aucune réponse n'est reçue ou si une réponse erronée est reçue ladite unité maître passe à l'étape de détection d'un canal vacant en sautant à un autre canal parmi ladite pluralité de canaux disponibles pour la transmission d'une manière non séquentielle.
  2. Procédé selon la revendication 1, caractérisé en ce que ladite unité maître saute à un autre canal en sélectionnant de façon aléatoire un autre canal parmi ladite pluralité de canaux disponibles pour la transmission.
  3. Procédé selon la revendication 1, caractérisé en ce que ladite unité maître saute à un autre canal en sélectionnant un autre canal parmi ladite pluralité de canaux disponibles pour la transmission conformément à une stratégie prédéfinie.
  4. Procédé selon la revendication 1, 2 ou 3, caractérisé en ce que ladite unité maître teste ledit canal pour une réponse, par exemple un signal de réponse (56) en attendant en un mode de réception pendant une durée prédéterminée.
  5. Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que ladite unité maître transmet ledit signal dans un intervalle de temps sélectionné parmi un certain nombre d'intervalles de temps disponibles et en ce que ledit nombre d'intervalles de temps est amélioré, par exemple doublé, lorsqu'une tentative de transmission a été effectuée sans succès.
  6. Procédé selon l'une quelconque des revendications 1 à 5, caractérisé en ce que ladite étape de détection d'un canal vacant comprend de tester pour une onde porteuse.
  7. Procédé selon l'une quelconque des revendications 1 à 6, caractérisé en ce que ladite au moins une unité esclave exécute l'étape de test desdits canaux pour un signal transmis en testant ledit préambule pour une caractéristique prédéfinie, par exemple un symbole, une séquence de bits, etc.
  8. Procédé selon l'une quelconque des revendications 1 à 7, caractérisé en ce que ladite au moins une unité esclave exécute l'étape de test desdits canaux pour une caractéristique prédéfinie, par exemple un symbole, une séquence de bits, etc., un nombre répété de fois, par exemple deux, trois, quatre fois, etc.
  9. Procédé selon l'une quelconque des revendications 1 à 8, caractérisé en ce que ladite au moins une unité esclave exécute l'étape de test desdits canaux pour un signal transmis en testant pour une onde porteuse.
  10. Procédé selon une ou plusieurs des revendications 1-9, caractérisé en ce que ladite unité maître exécute l'étape de test pour un canal vacant en balayant une pluralité de canaux.
  11. Procédé selon la revendication 10, caractérisé en ce que ledit balayage effectué par ladite unité maître est effectué conformément à des algorithmes prédéfinis, par exemple éventuellement en prenant en compte des transmissions effectuées antérieurement.
  12. Procédé selon une ou plusieurs des revendications 1-11, caractérisé en ce que ladite au moins une unité esclave exécute l'étape de balayage de canaux pour les signaux transmis en balayant de manière continue ou de manière essentiellement continue les canaux dans un ordre séquentiel.
  13. Système de commande pour transmettre des signaux, par exemple de signaux de commande, de signaux de requête, de signaux d'interrogation, etc., comprenant au moins deux unités, dans lequel au moins l'une desdites unités est conçue pour fonctionner comme une unité maître (26, 30, 34) et dans lequel au moins l'une desdites unités est conçue pour fonctionner comme une unité esclave (2, 4, 6, 8),
    - selon lequel lesdites unités sont conçues pour être aptes à utiliser une pluralité de canaux (CH1, CH2, CH3) pour la transmission,
    - selon lequel une unité maître est conçue pour exécuter les étapes de détection d'un canal vacant parmi ladite pluralité de canaux disponibles pour la transmission et de transmission d'un signal par l'intermédiaire dudit canal vacant, et
    - selon lequel au moins une unité esclave est conçue pour exécuter l'étape de balayage de la pluralité de canaux disponibles pour la transmission pour les signaux transmis,
    caractérisé en ce que
    - ladite unité maître est configurée pour transmettre un signal qui comprend un préambule (PRE1) ayant une longueur correspondant au moins à la durée requise pour que ladite au moins une unité esclave teste lesdits canaux pour un signal transmis et dans lequel ledit signal comprend en outre une adresse pour ladite unité esclave, et dans lequel
    - ladite unité maître est configurée pour attendre une réponse de l'unité esclave après avoir transmis ledit signal (54), et si aucune réponse n'est reçue ou si une réponse erronée est reçue ladite unité maître passe à l'étape de détection d'un canal vacant en sautant à un autre canal parmi ladite pluralité de canaux disponibles pour la transmission d'une manière non séquentielle.
  14. Système de commande selon la revendication 13, caractérisé en ce que ladite unité maître est configurée pour sauter à un autre canal en sélectionnant de façon aléatoire un autre canal parmi ladite pluralité de canaux disponibles pour la transmission.
  15. Système de commande selon la revendication 13, caractérisé en ce que ladite unité maître est configurée pour sauter à un autre canal en sélectionnant un autre canal parmi ladite pluralité de canaux disponibles pour la transmission conformément à une stratégie prédéfinie.
  16. Système de commande selon la revendication 13, 14 ou 15, caractérisé en ce que ladite unité maître est configurée pour tester ledit canal pour une réponse, par exemple un signal de réponse (56) en attendant en un mode de réception pendant une durée prédéterminée,
  17. Système de commande selon l'une quelconque des revendications 13 à 16, caractérisé en ce que ladite unité maître est configurée pour transmettre ledit signal dans un intervalle de temps sélectionné parmi un certain nombre d'intervalles de temps disponibles et en ce que ledit nombre d'intervalles de temps est amélioré, par exemple doublé, lorsqu'une tentative de transmission a été effectuée sans succès.
  18. Système de commande selon l'une quelconque des revendications 13 à 17, caractérisé en ce que ladite au moins une unité conçue pour fonctionner comme une unité maître comprend un moyen de commande pour effectuer un balayage d'une pluralité de canaux.
  19. Système de commande selon la revendication 18, caractérisé en ce que ledit moyen de commande comprend un moyen pour fonctionner conformément à des algorithmes prédéfinis.
  20. Système de commande selon l'une quelconque des revendications 13 à 19, caractérisé en ce que ladite au moins une unité conçue pour fonctionner comme une unité esclave comprend un moyen de commande pour effectuer un balayage séquentiel de la pluralité de canaux.
  21. Système de commande selon une ou plusieurs des revendications 13-20, caractérisé en ce que ledit système est conçu pour fonctionner conformément à un procédé selon une ou plusieurs des revendications 1-12.
EP05015582A 2002-01-03 2002-01-03 Procédé et système de transmission de signaux au moyen de sauts de fréquence Expired - Lifetime EP1598991B1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
PT05015582T PT1598991E (pt) 2002-01-03 2002-01-03 Método e sistema para transmitir sinais utilizando salto de frequência
DE60228141T DE60228141D1 (de) 2002-01-03 2002-01-03 Verfahren und System zum Übertragen von Signalen im Frequenzsprungverfahren
DK05015582T DK1598991T3 (da) 2002-01-03 2002-01-03 Fremgangsmåde og system til overförsel af signaler ved anvendelse af frekvensspring
ES05015582T ES2313156T3 (es) 2002-01-03 2002-01-03 Metodo y sistema de transmision de señales utilizando el salto de frecuencia.
AT05015582T ATE404004T1 (de) 2002-01-03 2002-01-03 Verfahren und system zum übertragen von signalen im frequenzsprungverfahren
EP05015582A EP1598991B1 (fr) 2002-01-03 2002-01-03 Procédé et système de transmission de signaux au moyen de sauts de fréquence

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP02805738A EP1461790B1 (fr) 2002-01-03 2002-01-03 Procede et systeme de transmission de signaux
EP05015582A EP1598991B1 (fr) 2002-01-03 2002-01-03 Procédé et système de transmission de signaux au moyen de sauts de fréquence

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP02805738A Division EP1461790B1 (fr) 2002-01-03 2002-01-03 Procede et systeme de transmission de signaux

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EP1598991A1 EP1598991A1 (fr) 2005-11-23
EP1598991B1 true EP1598991B1 (fr) 2008-08-06

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EP (1) EP1598991B1 (fr)
AT (1) ATE404004T1 (fr)
DE (1) DE60228141D1 (fr)
DK (1) DK1598991T3 (fr)
ES (1) ES2313156T3 (fr)
PT (1) PT1598991E (fr)

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JP5175782B2 (ja) * 2009-03-24 2013-04-03 トヨタ自動車株式会社 遠隔制御システム、および携帯機

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Publication number Priority date Publication date Assignee Title
GB2238147B (en) * 1989-11-16 1993-04-21 Gen Electric Co Plc Radio telemetry systems
DE9319508U1 (de) * 1993-12-18 1994-02-17 Hetronic Steuersysteme Gmbh Funkfernsteuerung
DE19502839C1 (de) * 1995-01-30 1996-06-05 Wolfgang Dipl Ing Brendel Empfangseinrichtung für eine Funk-Fernsteueranlage
DE19705502B4 (de) * 1997-02-13 2009-11-05 Wolfgang Brendel Funkfernsteueranlage
GB0018855D0 (en) * 2000-08-01 2000-09-20 Ripmax Plc Radio control transmitter and receiver

Also Published As

Publication number Publication date
DE60228141D1 (de) 2008-09-18
ES2313156T3 (es) 2009-03-01
DK1598991T3 (da) 2008-12-08
EP1598991A1 (fr) 2005-11-23
ATE404004T1 (de) 2008-08-15
PT1598991E (pt) 2008-11-13

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